بدست آوردن میزان فضای خالی یک درایو (پارتیشن)

ابتدا System.Management رو به References پروژه بیفزایید و سپس :

کد:

using System.Management;

کد:

public double GetHDDFreeSpace(string drive)
{
    //check to see if the user provided a drive letter
    //if not default it to "C"
    if (drive == "" || drive == null)
    {
        drive = "C";
    }
    //create our ManagementObject, passing it the drive letter to the
    //DevideID using WQL
    ManagementObject disk = new ManagementObject("Win32_LogicalDisk.DeviceID=\"" + drive + ":\"");
    //bind our management object
    disk.Get();
    //return the free space amount
    return Convert.ToDouble(disk["FreeSpace"]);
}